Oil-pump.



A. LOOMIS.

- OIL PUMP.

.APYLIOATION FILED 00115, 1907.

Patented July 28, 1914 3 SHEETS-SHEET l.

A. LOOMIS.

OIL PUMP.

APPLICATION FILED OCT. 15, 1907. 1,105,035 Patented July 28, 1914.

3 SHEETSSHEET 2.

g $2 I Q T a g In? 8 lllllllmmslll /f -dalw/i attozwu o A. LOOMIS.

OIL PUMP.

APPLICATION FILED 00T.15,1907. 1 1 @g ggg Patented July 28, 1914.

3 SHBETSSHEET 3.

EFTEE.

a ALLEN LOOMIS, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO PACKARD MOTOR CAR COMPANY, (3F DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAN.

OIL-PUMB.

Specification of Letters Patent.

To ail whom it may concern:

Be it known that I, ALLEN LooMis, a citizen of the United States, residing at De- -.t-roit, Wayne county, State of Michigan,

have invented certainnew and useful Improvements in Oil-Pumps, of which the following is a specification.

This invention comprises improvements in pumps for delivering oil from a common source of supply to various parts of an engine or other mechanism, and it is especially adapted for use in conneotion'with the motor mechanism of automobiles.

In the accompanying drawing which illustrates the invention, Figure 1 is a side elevation of the pump partly in vertical secerally projecting tubular bearing 1, in which 5 maybe lifted from its seat so that the valve thereof and engagim a is fitted an operating shaft 2. The sleeve or bearing 1 fits into a suitable opening 3 in the crank casing 4 of an engine and serves as a support for the pump as well as a hearing for the shaft 2. The shaft 2 is operated by a worm gear 5 arranged on the end WOIIH 6 upon a shaft 7 which is driven by the engine. The end of the driving or operating shaft of the pump which is within the casing is provided wit-h spur teeth 8 which engage the gear teeth 9 on a rotary distributing valve 7) which fits against a flat valve seat 10. The distributing valve is secured to a valve-stem llwhich is journaled in a cap 12, fitting into athreaded opening 13 in the side of the casing. This opening isof sullicient diameter to permit the valve to pass therethrough in assembling or dismantling the pump. The valve is held yieldingly against its seat by a spring 14 which encircles the valvestem and is arranged within a socket 15 on the inner side of the cap. The valve-stem is rovided with a suitable knob 16, and by pu ling outward upon the knob The valve or seat may be cleaned or washed out without removing any of the parts of the pump.

A crank pin 17 is secured to the inner end of the shaft 2, and a link or connecting rod 18 has one end journaled upon said pin and its opposite end l8 bent over at a right angle and extended into a longitudinal slot 19 in a pump piston or plunger 0 ar ranged within a cylinder 0, which is formed in the pump casing. The upper entl of the pump plunger is tubular and fitted with an adjusting screw 20 whichmay be set at varying distances from the lower end of the slot 19 so as to regulate the amount of play of the end 18 of the connecting rod in the slot 19. The purpose of providing lost motion between the connecting rod. and the plunger is to permit the plunger to remain stationary for a short time at the ends or" its strokes while the valve is moving from one operative position to the next as hereinafter explained. By means of the ad,- justing screw the extent of the delay int-he plunger movement, as well as the length of stroke of the plunger may be regulatedl The lower end of the plunger barrel or cylinder a is connected by a passageway 21 to a port 22- in the valve seat. A port23 is also arranged in the valve seat between its center and the port 22, and this port 23 is connected by a suitable passageway 24. to the inlet connection 25 through which the oil from the source of supply is admitted to the pump. Delivery ports 26 and 27 are also provided in the valve seat at a greater distance from the center of' the valve than the port 22, these delivery ports being arranged one at each side of the port 22, and

at equal distances therefrom, as shown in the drawing. The port 26 is connected by a passageway 28to an outlet 29 and the port 27 is connected by a passageway 30 tom outlet 31. These outlets 29 and 31 are suitable for the attachment of pipes for conveying oil to different parts of the mechanism which is to be lubricated.

The valve has twice as many gear teeth as the gear 8, and thevalve therefore makes one complete revolution for two complete inward and outward strokes of the plunger, and it has ports arranged to connect the pump cylinder withthe source of sup ply during each outward stroke of the plunger and to connect the pump cylinder with the delivery ports in the valve seat alter- Patented July 28, 1914.

"disks 'may be provided, with. teeth for en gaging the gear. teeth 8 upon the shaft Thuggin Fig-1, both disks aretprovided withgteeth, in Fig.4 only the disk-'6' is ro- I videdwith teeth and in Fig. 5 only the isk is providedwith teetl Onimarily, in valves havirighypass ports, the bodyof the valve isniade in one piece and the channels are cast or cut in the face of the valve.

In the present valve it will be scent-hat in constructing the valve the openings "for the ports may be punched out of a diskor gear Z2 and the other disk or gear 6 closes the openings at one side, thus making a very simple and inexpensive valve. The valve has two diametrically opposite wedge or fan-shape inlet ports 32 and 33 which register, in succession, with the ports 22 and 23, during successive upward strokes of the plunger, and which are out of register with said ports 22 and 23 during the downward strokes of the plunger. The valve is constantly driven and'during the time the plungcr is stationary at the end of its downward stroke one of the inlet ports in the valve movesinto register with the ports 22- and 23. The inlet port will remain in register with the ports 22 and 23 while the plunger is moving outward and will pass out of register while the plunger is stationary at the completion of its out-ward stroke. The valve is also'provided with outlet ports 34. and 35, the former of which :onnects. the ports 22 and 26 in the valve seat during one inward stroke of the plunger, while the latter connects the ports 22:and 27 during the suc ceeding inward stroke of the plunger. These outlet ports in the valve are brought into register with the port 22 before the plunger starts on its inward stroke. As shown in'the drawing, the port 34 comprises two arcuate channels 34* and 34:, arranged to register with the ports 22 and 26 respectively, and connected end to end by a 'chanl'lG1 or slot 34, and the port 35 is similarly formed, but reversely arranged in the valve, so that its channel 35 will register with the port 27 when its channel 35* is in register with the port 22.

The operation will be clear from an in spection of Figs. 6 to 9 inclusive of the drawing. In Fig. 6 the inlet port 33 in the valve is indicated as being in register with the ports 22 and 23 in the valve seat, so that the pump cylinder is connected to the source of supply. In this position of the valve the "plunger is moving outwardly and drawing a charge of 011 lnto the pump cylinder.

After the plunger has completed its outward movement the port 33 movcs'out of register 'with the ports 22 and 23, and just before the plunger moves downward the ports 22 and 26 are connected through the port 34. This osition is shown in Fig. 3 and the position of the valve when the plunger is one half way in on its retur movement is indicated in Fig. 7. During this inward movement it will be evident that the oil from the pump cylinder will flow throughv thepassageways 22 and 28 to the outlet 29. After the completion of this downward stroke the port 34 niovesout of register with the orts 22 and 26, and while the plunger ports 22 and 27, and-remains in register therewithduring the succeeding downward stroke, as ndicated in Fig. 9 thus connectin the passageway 30 and outlet 31 with th dm pump cylinder through the port 2 2.and passageway 21, so that a charge of oil is delivered into the pipe connected to the outlet 31.

' What I claim is,- i

1. In a force-feed lubricator, the combination with a pump cylinder, of a plunger therein, a valve-casing, a operating shaft extending into said casing, lost-motion connections between said shalt and plunger for operating the latter, said casing having a valve seattherein, a rotary valve fitting against said seat and geare to said shaft, said seat having an inlet port, two outlet ports at a greater radial distance from theaxis of the valve than said inlet port and arranged at opposite sides of the inlet port, and a port located nearer to the axis of the valve than said inlet port and eominuni eating with the pump cylinder, and said valve having diametrically opposite ports arranged to connect said inlet port with the pump cylinder port during each suction stroke of the plunger and having two similar, reversely arranged delivery ports ada ted to connect the pump cylinder port with the outlet ports, in succession, during succcssive compression strokes of the plunger, said deliver ports each comprising two slots in the valve ;ac'e connected end to end and located at dilierent radial distances from the axis of'the valve.

" 2. In a force feed lubricator, the combiports and a port nation with a pump cylinder, of a plunger thereimna'casing having a valve seat prO- vided. with an inlet port, a plurality of outlet communicating with the pump cylinder, an operating shaft projeeting into said casing and having spur teeth on its inner'end, a distrlbuting valve upon said seat, said, valve comprising two disks secured together, one disk having port holes cut therethrough and the other disk extending over said holes, one of said disks having spur teeth engaging the teeth on the shaft, and connections between the shaft and plunger for operating the latter.

3. in a force-feed lubricator, the combination with a pump cylinder and piston, and a suitable valve seat, of a rotary valve comprising a disk having suitable ports therein and an iinperforate disk secured thereto and covering said ports on one side of the first named disk, one of said disks being provided with teeth whereby the valve may be rotated.

4. In a force-feed lllbI'lCEltOIQil'lB combination With a pump cylinder and piston, and a suitable valve seat, of a rotary valve comprising a disk arranged to move over the valve seat and having perforations cooperating with the. ports of thevalve seat, an imperforate disk or plate arranged to cover the perforations at one side of the first named disk, teeth upon one of said disks for rotating the same, and means for yieldingly pressing the said rotary valve to its seat.

In testimony whereof I affix my signature in presence of two witnesses.

ALLEN LOOMIS.

lVitnesses MILTON TIBBETTS, CLARA DALE. 

